You can use the same type of differential oil for front and rear diffs. Any gear oil that meets the spec will work, best for most climates is a 75W-90 GL-5 synthetic gear oil. Motul 300, Redline, Castrol, Valvoline, any good brand really.

You need a Torx T70 bit to remove the drain plug. Refill through the dipstick hole. It takes about 1.5 quarts for the turbo cars. To avoid overfilling, add a little less and check the dipstick. If you overfill, you can remove the excess through the dipstick hole with a suction gun.

The maintenance interval is every 30K miles. It is easy to do and will help your car to last.